Microstructure and Mechanical Properties of Dissimilar Joints of AZ31 MG Alloy to Aluminium Alloys

2010 ◽  
Vol 638-642 ◽  
pp. 214-219 ◽  
Author(s):  
Woong Seong Chang ◽  
Heung Ju Kim ◽  
Sung Wook Kim
Keyword(s):  
Tensile Strength ◽  
Base Metal ◽  
Travel Speed ◽  
Mg Alloy ◽  
Dissimilar Joint ◽  
Al Alloy ◽  
Magnetic Pulse ◽  
Dissimilar Joints ◽  
Friction Stir ◽  
Az31 Mg Alloy

In attempts to improve the performance of dissimilar joints between AZ31 Mg alloy and different Al alloys, solid state joining processes such as Magnetic Pulse Welding (MPW) and Friction Stir Welding (FSW) were applied for minimizing the formation of brittle intermetallic phases. MPW process has been concentrated mainly on round section tube to tube and tube to bar welds. Mg alloy AZ31 has been successfully welded to pure Al A1070 as well as to Al alloy A3003. Tensile test clearly showed the MPW welds were stronger than the weaker of the base metal so failure occurred in aluminum base metal. While FSW process for the dissimilar joint between AZ31B/A6061 alloys with a thickness of 2mm revealed optimum weldability under the conditions of travel speed of 0.8mm/sec and tool rotation speed of 850rpm. For the sound dissimilar joint, the maximum tensile strength of 179 MPa, which was about 80 % of the Mg base metal tensile strength, has been obtained.

scholarly journals Mechanical and Microstructure properties analysis of Friction Stir Welded Similar and Dissimilar Mg alloy joints

2018 ◽  
Vol 8 (02) ◽  
Author(s):  
Akshansh Mishra ◽  
Anish Das Gupta ◽  
Abhishek Kumar Sharma ◽  
Gopikrishna Nidigonda
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Mg Alloy ◽  
Structural Components ◽  
Dissimilar Joints ◽  
Friction Stir

Friction Stir Welding is used already in routine, as well as critical applications, for the joining of structural components made of aluminium and its alloys. Indeed, it has been convincingly demonstrated that the process results in strong and ductile joints, sometimes in systems which have proved difficult using conventional welding techniques. The aim of this study was to evaluate microstructures, tensile strength and Hardness of welded specimen of Magnesium-Magnesium (Mg/Mg) similar joints and Magnesium-Aluminium (Mg/Al) dissimilar joints.

Study of friction stir welding between AZ31 Mg alloy and 6061 Al alloy joint using neutron diffraction

2021 ◽  
Author(s):  
K. Rina ◽  
I. Andon ◽  
M. Herry ◽  
S. Muhammad ◽  
P. M. A. Muzakkiy ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Neutron Diffraction ◽  
Mg Alloy ◽  
Al Alloy ◽  
Friction Stir ◽  
Az31 Mg Alloy ◽  
6061 Al Alloy

scholarly journals Friction Stir Weldability of High Tensile Strength Mg Alloy to Al Alloy

2009 ◽  
Vol 73 (2) ◽  
pp. 103-109 ◽  
Author(s):  
Naotsugu Yamamoto ◽  
Jinsun Liao ◽  
Shuhei Watanabe ◽  
Kazuhiro Nakata
Keyword(s):  
Tensile Strength ◽  
Mg Alloy ◽  
Al Alloy ◽  
High Tensile Strength ◽  
Friction Stir

scholarly journals The effect of material position of multi-pass friction stir processing on friction stir welded AA1050/AA6082 dissimilar joints

2021 ◽  
Vol 309 ◽  
pp. 01001
Author(s):  
Oritonda Muribwathoho ◽  
Velaphi Msomi ◽  
Ali Merdji ◽  
Sipokazi Mabuwa
Keyword(s):  
Grain Size ◽  
Tensile Strength ◽  
Friction Stir Welding ◽  
Friction Stir Processing ◽  
Vickers Microhardness ◽  
Microstructural Analysis ◽  
Dissimilar Joint ◽  
Dissimilar Joints ◽  
Friction Stir ◽  
Number Of Passes

The AA1050 and AA6082 plates were used in producing dissimilar joint through friction stir welding (FSW) technique. The developed dissimilar joint was then subjected to multi-pass friction stir processing (FSP) technique. Various tests for the AA1050/AA6082 (AA1050 on the advancing side) and AA6082/AA1050 (AA6082 on the advancing side) joints were conducted on joints subjected to 1pass (1P) and 4pass (4P). The microstructural analysis showed that the increase in number of FSP passes resulted in a reduced grain size regardless of the of material position. The Vickers microhardness for AA1050/AA6082 FSPed joints increased towards AA6082 side while the microhardness for AA6082/AA1050 FSPed joints decreased towards the AA 1050 side regardless the number of the passes. The ultimate tensile strength (UTS) of AA1050/AA6082 joint increased with an increase in the number of passes while AA6082/AA1050 fluctuated between the specimens sampled from different locations of the FSPed joints.

scholarly journals Cold-Rolling Strain Hardening Effect on the Microstructure, Serration-Flow Behaviour and Dislocation Density of Friction Stir Welded AA5083

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 70 ◽  
Author(s):  
Zainuddin Sajuri ◽  
Nor Fazilah Mohamad Selamat ◽  
Amir Hossein Baghdadi ◽  
Armin Rajabi ◽  
Mohd Zaidi Omar ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Dislocation Density ◽  
Cold Rolling ◽  
Strain Hardening ◽  
Base Metal ◽  
Welded Joint ◽  
Flow Behaviour ◽  
Al Alloy ◽  
Stress Strain ◽  
Friction Stir

5083 aluminium (Al) alloy materials have extensive structural applications in transportation industries because of their high strength-to-weight ratio and corrosion resistance. However, under conventional fusion weldings, these materials are limited by their porosity, hot cracking, and distortion. Herein, friction stir welding (FSW) was performed to join a similar AA5083 alloy. A post-weld cold-rolling (PWCR) process was applied on joint samples at different thickness-reduction percentages (i.e., 10%, 20%, and 40%) to identify the effect of strain hardening on the microstructure and mechanical properties of the friction-stir-welded joint of AA5083 while considering the serration-flow behaviour at stress–strain curves and dislocation density of the post-weld cold-rolled (PWCRed) samples. FSW induced a 20% reduction in the tensile strength of the joint samples relative to the base metal. PWCR also reduced the average grain size at the nugget zone and base metal because of the increase in plastic deformation imposed on the samples. Furthermore, PWCR increased the dislocation density because of the interaction among dislocation stress fields. Consequently, the tensile strength of the friction-stir-welded joint increased with the increased cold-rolling percentage and peaked at 403 MPa for PWCRed–40%, which significantly improved the serration-flow behaviour of stress–strain and welding efficiency up to 123%.

scholarly journals Aluminum corner joint using friction stir welding

2018 ◽  
Vol 159 ◽  
pp. 02053
Author(s):  
Djarot B. Darmadi ◽  
Widia Setiawan ◽  
Anindito Purnowidodo ◽  
Eko Siswanto
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Base Metal ◽  
Heat Input ◽  
Feed Rate ◽  
Constant Speed ◽  
Mg Alloy ◽  
Friction Stir ◽  
Mg Content

This article studies the feasibility of applying Friction Stir Welding (FSW) to an aluminum 6061 corner joint. The friction tool rotated at constant speed (2000 RPM) whilst feed rate varied in 10, 15 and 30 mm/minutes. Generally the lower feed rate produces higher tensile strength due to higher heat is embedded in the base metal, but the 15 mm/minute feed rate exhibited the least tensile strength. Lower feed rate reduces Mg alloy in base metal which in turn decreases the tensile strength. The final tensile strength is the compromise between higher heat input and lower Mg content that is why the 15 mm/minute has lowest tensile strength.

Influence of post welding heat treatment on the microstructure and mechanical properties of friction stir welding joint of AZ31 Mg alloy

2021 ◽  
pp. 095440892199762
Author(s):  
Kulwant Singh ◽  
Gurbhinder Singh ◽  
Harmeet Singh
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Friction Stir Welding ◽  
Magnesium Alloys ◽  
Tensile Failure ◽  
Mg Alloy ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties ◽  
Az31 Mg Alloy

At present, magnesium alloys are extensively used in numerous applications due to their light weight and better characteristics. Welding of magnesium alloys is regarded as one of the most complex phenomena in various industries. The friction stir welding of magnesium alloys has encouraged abundant scientific and industrial interest as it has the potency to form a good quality joint. Post welding heat treatment is an appropriate process to further improve the properties or performance of FSW joints. Therefore, the present work aims to join AZ31 Mg alloy plates by friction stir welding, and microstructural and mechanical properties of the joint have been examined. Furthermore, the consequence of post welding heat treatment on the microstructure and mechanical properties of FSW joint has been evaluated. Tensile strength and elongation of FSW joint were about 145.4 ± 4.9 MPa and 9.5 ± 0.9%, respectively. It was found that post welding heat treatment was beneficial in homogenizing grains and to enhance mechanical properties. Tensile strength and elongation of the joint were improved by 4.74% and 15.78% respectively after PWHT. The highest microhardness of stir zone decreased about 6.84% (73 Hv to 68 Hv) after heat treatment and hardness pattern of weld became relatively smooth. Toughness of PWHT joint was 4.5 ± 0.17 Joules. The mode of tensile failure of as-welded and PWHT joint was ductile.

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